DPI = dry powder inhaler, HFA = hydrofluoroalkane ... on technique (requires hand–breath coordination, slow and deep inhalation, and hand strength to actuate), lack of dose counter on device ...

In late 2023, Teva filed a complaint for patent infringement in response to Amneal’s ANDA filing seeking to make and sell a generic version of ProAir HFA (albuterol sulfate) Inhalation Aerosol ...